Calculate the area of a circle with radius 5.1cm

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

What is not true about kl and mn? what is mn? (show )